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1 /*-
2  * Copyright (c) 2000 Doug Rabson
3  * Copyright (c) 2000 Ruslan Ermilov
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  */
27
28 /*
29  * Fixes for 830/845G support: David Dawes <dawes@xfree86.org>
30  * 852GM/855GM/865G support added by David Dawes <dawes@xfree86.org>
31  */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include "opt_bus.h"
37
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/malloc.h>
41 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/bus.h>
44 #include <sys/lock.h>
45 #include <sys/mutex.h>
46 #include <sys/proc.h>
47
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pcireg.h>
50 #include <pci/agppriv.h>
51 #include <pci/agpreg.h>
52
53 #include <vm/vm.h>
54 #include <vm/vm_object.h>
55 #include <vm/vm_page.h>
56 #include <vm/vm_pageout.h>
57 #include <vm/pmap.h>
58
59 #include <machine/bus.h>
60 #include <machine/resource.h>
61 #include <sys/rman.h>
62
63 MALLOC_DECLARE(M_AGP);
64
65 #define READ1(off)      bus_space_read_1(sc->bst, sc->bsh, off)
66 #define READ4(off)      bus_space_read_4(sc->bst, sc->bsh, off)
67 #define WRITE4(off,v)   bus_space_write_4(sc->bst, sc->bsh, off, v)
68 #define WRITEGTT(off,v) bus_space_write_4(sc->gtt_bst, sc->gtt_bsh, off, v)
69
70 #define CHIP_I810 0     /* i810/i815 */
71 #define CHIP_I830 1     /* 830M/845G */
72 #define CHIP_I855 2     /* 852GM/855GM/865G */
73 #define CHIP_I915 3     /* 915G/915GM */
74
75 struct agp_i810_softc {
76         struct agp_softc agp;
77         u_int32_t initial_aperture;     /* aperture size at startup */
78         struct agp_gatt *gatt;
79         int chiptype;                   /* i810-like or i830 */
80         u_int32_t dcache_size;          /* i810 only */
81         u_int32_t stolen;               /* number of i830/845 gtt entries for stolen memory */
82         device_t bdev;                  /* bridge device */
83
84         struct resource *regs;          /* memory mapped GC registers */
85         bus_space_tag_t bst;            /* bus_space tag */
86         bus_space_handle_t bsh;         /* bus_space handle */
87
88         struct resource *gtt;           /* memory mapped GATT entries */
89         bus_space_tag_t gtt_bst;        /* bus_space tag */
90         bus_space_handle_t gtt_bsh;     /* bus_space handle */
91
92         void *argb_cursor;              /* contigmalloc area for ARGB cursor */
93 };
94
95 /* For adding new devices, devid is the id of the graphics controller
96  * (pci:0:2:0, for example).  The placeholder (usually at pci:0:2:1) for the
97  * second head should never be added.  The bridge_offset is the offset to
98  * subtract from devid to get the id of the hostb that the device is on.
99  */
100 static const struct agp_i810_match {
101         int devid;
102         int chiptype;
103         int bridge_offset;
104         char *name;
105 } agp_i810_matches[] = {
106         {0x71218086, CHIP_I810, 0x00010000,
107             "Intel 82810 (i810 GMCH) SVGA controller"},
108         {0x71238086, CHIP_I810, 0x00010000,
109             "Intel 82810-DC100 (i810-DC100 GMCH) SVGA controller"},
110         {0x71258086, CHIP_I810, 0x00010000,
111             "Intel 82810E (i810E GMCH) SVGA controller"},
112         {0x11328086, CHIP_I810, 0x00020000,
113             "Intel 82815 (i815 GMCH) SVGA controller"},
114         {0x35778086, CHIP_I830, 0x00020000,
115             "Intel 82830M (830M GMCH) SVGA controller"},
116         {0x35828086, CHIP_I855, 0x00020000,
117             "Intel 82852/5"},
118         {0x25728086, CHIP_I855, 0x00020000,
119             "Intel 82865G (865G GMCH) SVGA controller"},
120         {0x25828086, CHIP_I915, 0x00020000,
121             "Intel 82915G (915G GMCH) SVGA controller"},
122         {0x25928086, CHIP_I915, 0x00020000,
123             "Intel 82915GM (915GM GMCH) SVGA controller"},
124         /* XXX: I believe these chipsets should work, but they haven't been
125          * tested yet.
126          */
127         /*
128         {0x27728086, CHIP_I915, 0x00020000,
129             "Intel 82945G (945G GMCH) SVGA controller"},
130         {0x27A28086, CHIP_I915, 0x00020000,
131             "Intel 82945GM (945GM GMCH) SVGA controller"},
132         */
133         {0, 0, 0, NULL}
134 };
135
136 static const struct agp_i810_match*
137 agp_i810_match(device_t dev)
138 {
139         int i, devid;
140
141         if (pci_get_class(dev) != PCIC_DISPLAY
142             || pci_get_subclass(dev) != PCIS_DISPLAY_VGA)
143                 return NULL;
144
145         devid = pci_get_devid(dev);
146         for (i = 0; agp_i810_matches[i].devid != 0; i++) {
147                 if (agp_i810_matches[i].devid == devid)
148                     break;
149         }
150         if (agp_i810_matches[i].devid == 0)
151                 return NULL;
152         else
153                 return &agp_i810_matches[i];
154 }
155
156 /*
157  * Find bridge device.
158  */
159 static device_t
160 agp_i810_find_bridge(device_t dev)
161 {
162         device_t *children, child;
163         int nchildren, i;
164         u_int32_t devid;
165         const struct agp_i810_match *match;
166   
167         match = agp_i810_match(dev);
168         devid = match->devid - match->bridge_offset;
169
170         if (device_get_children(device_get_parent(device_get_parent(dev)),
171             &children, &nchildren))
172                 return 0;
173
174         for (i = 0; i < nchildren; i++) {
175                 child = children[i];
176
177                 if (pci_get_devid(child) == devid) {
178                         free(children, M_TEMP);
179                         return child;
180                 }
181         }
182         free(children, M_TEMP);
183         return 0;
184 }
185
186 static void
187 agp_i810_identify(driver_t *driver, device_t parent)
188 {
189
190         if (device_find_child(parent, "agp", -1) == NULL &&
191             agp_i810_match(parent))
192                 device_add_child(parent, "agp", -1);
193 }
194
195 static int
196 agp_i810_probe(device_t dev)
197 {
198         device_t bdev;
199         const struct agp_i810_match *match;
200
201         if (resource_disabled("agp", device_get_unit(dev)))
202                 return (ENXIO);
203         match = agp_i810_match(dev);
204         if (match == NULL)
205                 return ENXIO;
206
207         bdev = agp_i810_find_bridge(dev);
208         if (!bdev) {
209                 if (bootverbose)
210                         printf("I810: can't find bridge device\n");
211                 return ENXIO;
212         }
213
214         /*
215          * checking whether internal graphics device has been activated.
216          */
217         if (match->chiptype == CHIP_I810) {
218                 u_int8_t smram;
219
220                 smram = pci_read_config(bdev, AGP_I810_SMRAM, 1);
221                 if ((smram & AGP_I810_SMRAM_GMS)
222                     == AGP_I810_SMRAM_GMS_DISABLED) {
223                         if (bootverbose)
224                                 printf("I810: disabled, not probing\n");
225                         return ENXIO;
226                 }
227         } else if (match->chiptype == CHIP_I830 ||
228             match->chiptype == CHIP_I855) {
229                 unsigned int gcc1;
230
231                 gcc1 = pci_read_config(bdev, AGP_I830_GCC1, 1);
232                 if ((gcc1 & AGP_I830_GCC1_DEV2) ==
233                     AGP_I830_GCC1_DEV2_DISABLED) {
234                         if (bootverbose)
235                                 printf("I830: disabled, not probing\n");
236                         return ENXIO;
237                 }
238         } else if (match->chiptype == CHIP_I915) {
239                 unsigned int gcc1;
240
241                 gcc1 = pci_read_config(bdev, AGP_I915_DEVEN, 4);
242                 if ((gcc1 & AGP_I915_DEVEN_D2F0) ==
243                     AGP_I915_DEVEN_D2F0_DISABLED) {
244                         if (bootverbose)
245                                 printf("I915: disabled, not probing\n");
246                         return ENXIO;
247                 }
248         }
249
250         if (match->devid == 0x35828086) {
251                 switch (pci_read_config(dev, AGP_I85X_CAPID, 1)) {
252                 case AGP_I855_GME:
253                         device_set_desc(dev,
254                             "Intel 82855GME (855GME GMCH) SVGA controller");
255                         break;
256                 case AGP_I855_GM:
257                         device_set_desc(dev,
258                             "Intel 82855GM (855GM GMCH) SVGA controller");
259                         break;
260                 case AGP_I852_GME:
261                         device_set_desc(dev,
262                             "Intel 82852GME (852GME GMCH) SVGA controller");
263                         break;
264                 case AGP_I852_GM:
265                         device_set_desc(dev,
266                             "Intel 82852GM (852GM GMCH) SVGA controller");
267                         break;
268                 default:
269                         device_set_desc(dev,
270                             "Intel 8285xM (85xGM GMCH) SVGA controller");
271                         break;
272                 }
273         } else {
274                 device_set_desc(dev, match->name);
275         }
276
277         return BUS_PROBE_DEFAULT;
278 }
279
280 static int
281 agp_i810_attach(device_t dev)
282 {
283         struct agp_i810_softc *sc = device_get_softc(dev);
284         struct agp_gatt *gatt;
285         const struct agp_i810_match *match;
286         int error, rid;
287
288         sc->bdev = agp_i810_find_bridge(dev);
289         if (!sc->bdev)
290                 return ENOENT;
291
292         error = agp_generic_attach(dev);
293         if (error)
294                 return error;
295
296         match = agp_i810_match(dev);
297         sc->chiptype = match->chiptype;
298
299         /* Same for i810 and i830 */
300         if (sc->chiptype == CHIP_I915)
301                 rid = AGP_I915_MMADR;
302         else
303                 rid = AGP_I810_MMADR;
304
305         sc->regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
306                                           RF_ACTIVE);
307         if (!sc->regs) {
308                 agp_generic_detach(dev);
309                 return ENODEV;
310         }
311         sc->bst = rman_get_bustag(sc->regs);
312         sc->bsh = rman_get_bushandle(sc->regs);
313
314         if (sc->chiptype == CHIP_I915) {
315                 rid = AGP_I915_GTTADR;
316                 sc->gtt = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
317                                                  RF_ACTIVE);
318                 if (!sc->gtt) {
319                         bus_release_resource(dev, SYS_RES_MEMORY,
320                                              AGP_I810_MMADR, sc->regs);
321                         agp_generic_detach(dev);
322                         return ENODEV;
323                 }
324                 sc->gtt_bst = rman_get_bustag(sc->gtt);
325                 sc->gtt_bsh = rman_get_bushandle(sc->gtt);
326         }
327
328         sc->initial_aperture = AGP_GET_APERTURE(dev);
329
330         gatt = malloc( sizeof(struct agp_gatt), M_AGP, M_NOWAIT);
331         if (!gatt) {
332                 agp_generic_detach(dev);
333                 return ENOMEM;
334         }
335         sc->gatt = gatt;
336
337         gatt->ag_entries = AGP_GET_APERTURE(dev) >> AGP_PAGE_SHIFT;
338
339         if ( sc->chiptype == CHIP_I810 ) {
340                 /* Some i810s have on-chip memory called dcache */
341                 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
342                         sc->dcache_size = 4 * 1024 * 1024;
343                 else
344                         sc->dcache_size = 0;
345
346                 /* According to the specs the gatt on the i810 must be 64k */
347                 gatt->ag_virtual = contigmalloc( 64 * 1024, M_AGP, 0, 
348                                         0, ~0, PAGE_SIZE, 0);
349                 if (!gatt->ag_virtual) {
350                         if (bootverbose)
351                                 device_printf(dev, "contiguous allocation failed\n");
352                         free(gatt, M_AGP);
353                         agp_generic_detach(dev);
354                         return ENOMEM;
355                 }
356                 bzero(gatt->ag_virtual, gatt->ag_entries * sizeof(u_int32_t));
357         
358                 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual);
359                 agp_flush_cache();
360                 /* Install the GATT. */
361                 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1);
362         } else if ( sc->chiptype == CHIP_I830 ) {
363                 /* The i830 automatically initializes the 128k gatt on boot. */
364                 unsigned int gcc1, pgtblctl;
365                 
366                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 1);
367                 switch (gcc1 & AGP_I830_GCC1_GMS) {
368                         case AGP_I830_GCC1_GMS_STOLEN_512:
369                                 sc->stolen = (512 - 132) * 1024 / 4096;
370                                 break;
371                         case AGP_I830_GCC1_GMS_STOLEN_1024: 
372                                 sc->stolen = (1024 - 132) * 1024 / 4096;
373                                 break;
374                         case AGP_I830_GCC1_GMS_STOLEN_8192: 
375                                 sc->stolen = (8192 - 132) * 1024 / 4096;
376                                 break;
377                         default:
378                                 sc->stolen = 0;
379                                 device_printf(dev, "unknown memory configuration, disabling\n");
380                                 agp_generic_detach(dev);
381                                 return EINVAL;
382                 }
383                 if (sc->stolen > 0)
384                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
385                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
386
387                 /* GATT address is already in there, make sure it's enabled */
388                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
389                 pgtblctl |= 1;
390                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
391
392                 gatt->ag_physical = pgtblctl & ~1;
393         } else if (sc->chiptype == CHIP_I855 || sc->chiptype == CHIP_I915) {    /* CHIP_I855 */
394                 unsigned int gcc1, pgtblctl, stolen;
395
396                 /* Stolen memory is set up at the beginning of the aperture by
397                  * the BIOS, consisting of the GATT followed by 4kb for the BIOS
398                  * display.
399                  */
400                 if (sc->chiptype == CHIP_I855)
401                         stolen = 132;
402                 else
403                         stolen = 260;
404
405                 gcc1 = pci_read_config(sc->bdev, AGP_I855_GCC1, 1);
406                 switch (gcc1 & AGP_I855_GCC1_GMS) {
407                         case AGP_I855_GCC1_GMS_STOLEN_1M:
408                                 sc->stolen = (1024 - stolen) * 1024 / 4096;
409                                 break;
410                         case AGP_I855_GCC1_GMS_STOLEN_4M: 
411                                 sc->stolen = (4096 - stolen) * 1024 / 4096;
412                                 break;
413                         case AGP_I855_GCC1_GMS_STOLEN_8M: 
414                                 sc->stolen = (8192 - stolen) * 1024 / 4096;
415                                 break;
416                         case AGP_I855_GCC1_GMS_STOLEN_16M: 
417                                 sc->stolen = (16384 - stolen) * 1024 / 4096;
418                                 break;
419                         case AGP_I855_GCC1_GMS_STOLEN_32M: 
420                                 sc->stolen = (32768 - stolen) * 1024 / 4096;
421                                 break;
422                         case AGP_I915_GCC1_GMS_STOLEN_48M: 
423                                 sc->stolen = (49152 - stolen) * 1024 / 4096;
424                                 break;
425                         case AGP_I915_GCC1_GMS_STOLEN_64M: 
426                                 sc->stolen = (65536 - stolen) * 1024 / 4096;
427                                 break;
428                         default:
429                                 sc->stolen = 0;
430                                 device_printf(dev, "unknown memory configuration, disabling\n");
431                                 agp_generic_detach(dev);
432                                 return EINVAL;
433                 }
434                 if (sc->stolen > 0)
435                         device_printf(dev, "detected %dk stolen memory\n", sc->stolen * 4);
436                 device_printf(dev, "aperture size is %dM\n", sc->initial_aperture / 1024 / 1024);
437
438                 /* GATT address is already in there, make sure it's enabled */
439                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
440                 pgtblctl |= 1;
441                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
442
443                 gatt->ag_physical = pgtblctl & ~1;
444         }
445
446         return 0;
447 }
448
449 static int
450 agp_i810_detach(device_t dev)
451 {
452         struct agp_i810_softc *sc = device_get_softc(dev);
453         int error;
454
455         error = agp_generic_detach(dev);
456         if (error)
457                 return error;
458
459         /* Clear the GATT base. */
460         if ( sc->chiptype == CHIP_I810 ) {
461                 WRITE4(AGP_I810_PGTBL_CTL, 0);
462         } else {
463                 unsigned int pgtblctl;
464                 pgtblctl = READ4(AGP_I810_PGTBL_CTL);
465                 pgtblctl &= ~1;
466                 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl);
467         }
468
469         /* Put the aperture back the way it started. */
470         AGP_SET_APERTURE(dev, sc->initial_aperture);
471
472         if ( sc->chiptype == CHIP_I810 ) {
473                 contigfree(sc->gatt->ag_virtual, 64 * 1024, M_AGP);
474         }
475         free(sc->gatt, M_AGP);
476
477         if (sc->chiptype == CHIP_I915) {
478                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_GTTADR,
479                                      sc->gtt);
480                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I915_MMADR,
481                                      sc->regs);
482         } else {
483                 bus_release_resource(dev, SYS_RES_MEMORY, AGP_I810_MMADR,
484                                      sc->regs);
485         }
486
487         return 0;
488 }
489
490 static u_int32_t
491 agp_i810_get_aperture(device_t dev)
492 {
493         struct agp_i810_softc *sc = device_get_softc(dev);
494         uint32_t temp;
495         u_int16_t miscc;
496
497         switch (sc->chiptype) {
498         case CHIP_I810:
499                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
500                 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
501                         return 32 * 1024 * 1024;
502                 else
503                         return 64 * 1024 * 1024;
504         case CHIP_I830:
505                 temp = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
506                 if ((temp & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
507                         return 64 * 1024 * 1024;
508                 else
509                         return 128 * 1024 * 1024;
510         case CHIP_I855:
511                 return 128 * 1024 * 1024;
512         case CHIP_I915:
513                 temp = pci_read_config(dev, AGP_I915_MSAC, 1);
514                 if ((temp & AGP_I915_MSAC_GMASIZE) ==
515                     AGP_I915_MSAC_GMASIZE_128) {
516                         return 128 * 1024 * 1024;
517                 } else {
518                         return 256 * 1024 * 1024;
519                 }
520         }
521
522         return 0;
523 }
524
525 static int
526 agp_i810_set_aperture(device_t dev, u_int32_t aperture)
527 {
528         struct agp_i810_softc *sc = device_get_softc(dev);
529         u_int16_t miscc, gcc1;
530         u_int32_t temp;
531
532         switch (sc->chiptype) {
533         case CHIP_I810:
534                 /*
535                  * Double check for sanity.
536                  */
537                 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
538                         device_printf(dev, "bad aperture size %d\n", aperture);
539                         return EINVAL;
540                 }
541
542                 miscc = pci_read_config(sc->bdev, AGP_I810_MISCC, 2);
543                 miscc &= ~AGP_I810_MISCC_WINSIZE;
544                 if (aperture == 32 * 1024 * 1024)
545                         miscc |= AGP_I810_MISCC_WINSIZE_32;
546                 else
547                         miscc |= AGP_I810_MISCC_WINSIZE_64;
548         
549                 pci_write_config(sc->bdev, AGP_I810_MISCC, miscc, 2);
550                 break;
551         case CHIP_I830:
552                 if (aperture != 64 * 1024 * 1024 &&
553                     aperture != 128 * 1024 * 1024) {
554                         device_printf(dev, "bad aperture size %d\n", aperture);
555                         return EINVAL;
556                 }
557                 gcc1 = pci_read_config(sc->bdev, AGP_I830_GCC1, 2);
558                 gcc1 &= ~AGP_I830_GCC1_GMASIZE;
559                 if (aperture == 64 * 1024 * 1024)
560                         gcc1 |= AGP_I830_GCC1_GMASIZE_64;
561                 else
562                         gcc1 |= AGP_I830_GCC1_GMASIZE_128;
563
564                 pci_write_config(sc->bdev, AGP_I830_GCC1, gcc1, 2);
565                 break;
566         case CHIP_I855:
567                 if (aperture != 128 * 1024 * 1024) {
568                         device_printf(dev, "bad aperture size %d\n", aperture);
569                         return EINVAL;
570                 }
571                 break;
572         case CHIP_I915:
573                 temp = pci_read_config(dev, AGP_I915_MSAC, 1);
574                 temp &= ~AGP_I915_MSAC_GMASIZE;
575
576                 switch (aperture) {
577                 case 128 * 1024 * 1024:
578                         temp |= AGP_I915_MSAC_GMASIZE_128;
579                         break;
580                 case 256 * 1024 * 1024:
581                         temp |= AGP_I915_MSAC_GMASIZE_256;
582                         break;
583                 default:
584                         device_printf(dev, "bad aperture size %d\n", aperture);
585                         return EINVAL;
586                 }
587
588                 pci_write_config(dev, AGP_I915_MSAC, temp, 1);
589                 break;
590         }
591
592         return 0;
593 }
594
595 static int
596 agp_i810_bind_page(device_t dev, int offset, vm_offset_t physical)
597 {
598         struct agp_i810_softc *sc = device_get_softc(dev);
599
600         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) {
601                 device_printf(dev, "failed: offset is 0x%08x, shift is %d, entries is %d\n", offset, AGP_PAGE_SHIFT, sc->gatt->ag_entries);
602                 return EINVAL;
603         }
604
605         if ( sc->chiptype != CHIP_I810 ) {
606                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
607                         device_printf(dev, "trying to bind into stolen memory");
608                         return EINVAL;
609                 }
610         }
611
612         if (sc->chiptype == CHIP_I915) {
613                 WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
614         } else {
615                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, physical | 1);
616         }
617
618         return 0;
619 }
620
621 static int
622 agp_i810_unbind_page(device_t dev, int offset)
623 {
624         struct agp_i810_softc *sc = device_get_softc(dev);
625
626         if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT))
627                 return EINVAL;
628
629         if ( sc->chiptype != CHIP_I810 ) {
630                 if ( (offset >> AGP_PAGE_SHIFT) < sc->stolen ) {
631                         device_printf(dev, "trying to unbind from stolen memory");
632                         return EINVAL;
633                 }
634         }
635
636         if (sc->chiptype == CHIP_I915) {
637                 WRITEGTT((offset >> AGP_PAGE_SHIFT) * 4, 0);
638         } else {
639                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4, 0);
640         }
641         
642         return 0;
643 }
644
645 /*
646  * Writing via memory mapped registers already flushes all TLBs.
647  */
648 static void
649 agp_i810_flush_tlb(device_t dev)
650 {
651 }
652
653 static int
654 agp_i810_enable(device_t dev, u_int32_t mode)
655 {
656
657         return 0;
658 }
659
660 static struct agp_memory *
661 agp_i810_alloc_memory(device_t dev, int type, vm_size_t size)
662 {
663         struct agp_i810_softc *sc = device_get_softc(dev);
664         struct agp_memory *mem;
665
666         if ((size & (AGP_PAGE_SIZE - 1)) != 0)
667                 return 0;
668
669         if (sc->agp.as_allocated + size > sc->agp.as_maxmem)
670                 return 0;
671
672         if (type == 1) {
673                 /*
674                  * Mapping local DRAM into GATT.
675                  */
676                 if ( sc->chiptype != CHIP_I810 )
677                         return 0;
678                 if (size != sc->dcache_size)
679                         return 0;
680         } else if (type == 2) {
681                 /*
682                  * Type 2 is the contiguous physical memory type, that hands
683                  * back a physical address.  This is used for cursors on i810.
684                  * Hand back as many single pages with physical as the user
685                  * wants, but only allow one larger allocation (ARGB cursor)
686                  * for simplicity.
687                  */
688                 if (size != AGP_PAGE_SIZE) {
689                         if (sc->argb_cursor != NULL)
690                                 return 0;
691
692                         /* Allocate memory for ARGB cursor, if we can. */
693                         sc->argb_cursor = contigmalloc(size, M_AGP,
694                            0, 0, ~0, PAGE_SIZE, 0);
695                         if (sc->argb_cursor == NULL)
696                                 return 0;
697                 }
698         }
699
700         mem = malloc(sizeof *mem, M_AGP, M_WAITOK);
701         mem->am_id = sc->agp.as_nextid++;
702         mem->am_size = size;
703         mem->am_type = type;
704         if (type != 1 && (type != 2 || size == AGP_PAGE_SIZE))
705                 mem->am_obj = vm_object_allocate(OBJT_DEFAULT,
706                                                  atop(round_page(size)));
707         else
708                 mem->am_obj = 0;
709
710         if (type == 2) {
711                 if (size == AGP_PAGE_SIZE) {
712                         /*
713                          * Allocate and wire down the page now so that we can
714                          * get its physical address.
715                          */
716                         vm_page_t m;
717         
718                         VM_OBJECT_LOCK(mem->am_obj);
719                         m = vm_page_grab(mem->am_obj, 0, VM_ALLOC_NOBUSY |
720                             VM_ALLOC_WIRED | VM_ALLOC_ZERO | VM_ALLOC_RETRY);
721                         VM_OBJECT_UNLOCK(mem->am_obj);
722                         mem->am_physical = VM_PAGE_TO_PHYS(m);
723                 } else {
724                         /* Our allocation is already nicely wired down for us.
725                          * Just grab the physical address.
726                          */
727                         mem->am_physical = vtophys(sc->argb_cursor);
728                 }
729         } else {
730                 mem->am_physical = 0;
731         }
732
733         mem->am_offset = 0;
734         mem->am_is_bound = 0;
735         TAILQ_INSERT_TAIL(&sc->agp.as_memory, mem, am_link);
736         sc->agp.as_allocated += size;
737
738         return mem;
739 }
740
741 static int
742 agp_i810_free_memory(device_t dev, struct agp_memory *mem)
743 {
744         struct agp_i810_softc *sc = device_get_softc(dev);
745
746         if (mem->am_is_bound)
747                 return EBUSY;
748
749         if (mem->am_type == 2) {
750                 if (mem->am_size == AGP_PAGE_SIZE) {
751                         /*
752                          * Unwire the page which we wired in alloc_memory.
753                          */
754                         vm_page_t m;
755         
756                         VM_OBJECT_LOCK(mem->am_obj);
757                         m = vm_page_lookup(mem->am_obj, 0);
758                         VM_OBJECT_UNLOCK(mem->am_obj);
759                         vm_page_lock_queues();
760                         vm_page_unwire(m, 0);
761                         vm_page_unlock_queues();
762                 } else {
763                         contigfree(sc->argb_cursor, mem->am_size, M_AGP);
764                         sc->argb_cursor = NULL;
765                 }
766         }
767
768         sc->agp.as_allocated -= mem->am_size;
769         TAILQ_REMOVE(&sc->agp.as_memory, mem, am_link);
770         if (mem->am_obj)
771                 vm_object_deallocate(mem->am_obj);
772         free(mem, M_AGP);
773         return 0;
774 }
775
776 static int
777 agp_i810_bind_memory(device_t dev, struct agp_memory *mem,
778                      vm_offset_t offset)
779 {
780         struct agp_i810_softc *sc = device_get_softc(dev);
781         vm_offset_t i;
782
783         /* Do some sanity checks first. */
784         if (offset < 0 || (offset & (AGP_PAGE_SIZE - 1)) != 0 ||
785             offset + mem->am_size > AGP_GET_APERTURE(dev)) {
786                 device_printf(dev, "binding memory at bad offset %#x\n",
787                     (int)offset);
788                 return EINVAL;
789         }
790
791         if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
792                 mtx_lock(&sc->agp.as_lock);
793                 if (mem->am_is_bound) {
794                         mtx_unlock(&sc->agp.as_lock);
795                         return EINVAL;
796                 }
797                 /* The memory's already wired down, just stick it in the GTT. */
798                 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
799                         u_int32_t physical = mem->am_physical + i;
800
801                         if (sc->chiptype == CHIP_I915) {
802                                 WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
803                                     physical | 1);
804                         } else {
805                                 WRITE4(AGP_I810_GTT +
806                                     ((offset + i) >> AGP_PAGE_SHIFT) * 4,
807                                     physical | 1);
808                         }
809                 }
810                 agp_flush_cache();
811                 mem->am_offset = offset;
812                 mem->am_is_bound = 1;
813                 mtx_unlock(&sc->agp.as_lock);
814                 return 0;
815         }
816
817         if (mem->am_type != 1)
818                 return agp_generic_bind_memory(dev, mem, offset);
819
820         if ( sc->chiptype != CHIP_I810 )
821                 return EINVAL;
822
823         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
824                 WRITE4(AGP_I810_GTT + (offset >> AGP_PAGE_SHIFT) * 4,
825                        i | 3);
826         }
827
828         return 0;
829 }
830
831 static int
832 agp_i810_unbind_memory(device_t dev, struct agp_memory *mem)
833 {
834         struct agp_i810_softc *sc = device_get_softc(dev);
835         vm_offset_t i;
836
837         if (mem->am_type == 2 && mem->am_size != AGP_PAGE_SIZE) {
838                 mtx_lock(&sc->agp.as_lock);
839                 if (!mem->am_is_bound) {
840                         mtx_unlock(&sc->agp.as_lock);
841                         return EINVAL;
842                 }
843
844                 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
845                         vm_offset_t offset = mem->am_offset;
846
847                         if (sc->chiptype == CHIP_I915) {
848                                 WRITEGTT(((offset + i) >> AGP_PAGE_SHIFT) * 4,
849                                     0);
850                         } else {
851                                 WRITE4(AGP_I810_GTT +
852                                     ((offset + i) >> AGP_PAGE_SHIFT) * 4, 0);
853                         }
854                 }
855                 agp_flush_cache();
856                 mem->am_is_bound = 0;
857                 mtx_unlock(&sc->agp.as_lock);
858                 return 0;
859         }
860
861         if (mem->am_type != 1)
862                 return agp_generic_unbind_memory(dev, mem);
863
864         if ( sc->chiptype != CHIP_I810 )
865                 return EINVAL;
866
867         for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
868                 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
869
870         return 0;
871 }
872
873 static device_method_t agp_i810_methods[] = {
874         /* Device interface */
875         DEVMETHOD(device_identify,      agp_i810_identify),
876         DEVMETHOD(device_probe,         agp_i810_probe),
877         DEVMETHOD(device_attach,        agp_i810_attach),
878         DEVMETHOD(device_detach,        agp_i810_detach),
879
880         /* AGP interface */
881         DEVMETHOD(agp_get_aperture,     agp_i810_get_aperture),
882         DEVMETHOD(agp_set_aperture,     agp_i810_set_aperture),
883         DEVMETHOD(agp_bind_page,        agp_i810_bind_page),
884         DEVMETHOD(agp_unbind_page,      agp_i810_unbind_page),
885         DEVMETHOD(agp_flush_tlb,        agp_i810_flush_tlb),
886         DEVMETHOD(agp_enable,           agp_i810_enable),
887         DEVMETHOD(agp_alloc_memory,     agp_i810_alloc_memory),
888         DEVMETHOD(agp_free_memory,      agp_i810_free_memory),
889         DEVMETHOD(agp_bind_memory,      agp_i810_bind_memory),
890         DEVMETHOD(agp_unbind_memory,    agp_i810_unbind_memory),
891
892         { 0, 0 }
893 };
894
895 static driver_t agp_i810_driver = {
896         "agp",
897         agp_i810_methods,
898         sizeof(struct agp_i810_softc),
899 };
900
901 static devclass_t agp_devclass;
902
903 DRIVER_MODULE(agp_i810, vgapci, agp_i810_driver, agp_devclass, 0, 0);
904 MODULE_DEPEND(agp_i810, agp, 1, 1, 1);
905 MODULE_DEPEND(agp_i810, pci, 1, 1, 1);